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We investigate the heterogeneity of dynamics, the breakdown of theStokes-Einstein relation and fragility in a model glass forming liquid, abinary mixture of soft spheres with a harmonic interaction potential, forspatial dimensions from 3 to 8. Dynamical heterogeneity is quantified throughthe dynamical susceptibility $\chi_4$, and the non-Gaussian parameter$\alpha_2$. We find that the fragility, the degree of breakdown of theStokes-Einstein relation, as well as heterogeneity of dynamics, decrease withincreasing spatial dimensionality. We briefly describe the dependence offragility on density, and use it to resolve an apparent inconsistency withprevious results.

Spatial Dimensionality Dependence of Heterogeneity, Breakdown of the Stokes-Einstein Relation and Fragility of a Model Glass-Forming Liquid